Abstract: A support for overpronation is provided with a fitted support, which can be fitted on a foot, and a fastening belt. One end of the fastening belt is detachably fixed to a position in the fitted support that corresponds to the first metatarsophalangeal joint, the middle section of the belt is wound around the heel and the other end is detachably fixed to a position in the fitted support that corresponds to the Lisfranc joint and/or Chopart's joint. With the heel section as an anchor, external force is provided in opposing directions, between the first metatarsophalangeal joint and the Lisfranc joint, or the first metatarsophalangeal joint and Chopart's joint. The support for oversupination is fitted in the opposite way, providing external force in opposing directions.